Most people know some basic metrics to look for when picking a niche. We look for a variety of factors such as domain authority, page ranking, etc. Depending on the tools you use you probably are exposed to some custom proprietary metric. Arguably monthly traffic is one of the most important factors when establishing a niche. It's got to be small enough that the competition isn't fierce, yet big enough that you will actually get traffic. You would obviously much rather be on the first page of Google for a keyword that gets 4000 exact searches per month, than on the 5th page for a keyword that gets 400000 searches per month. I've seen approaches from people who target sites that are 20-40k searches a month to people targeting keywords that get 200 a month. I personally think that's risky. I've found the sweet spot for my approach for authority sites to be around 3-7k with some decent competition. My personal minimum is 3k min searches per month (Exact match!) Have you had any success going lower?